311502493 has 2 divisors, whose sum is σ = 311502494. Its totient is φ = 311502492.

The previous prime is 311502481. The next prime is 311502523. The reversal of 311502493 is 394205113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220166244 + 91336249 = 14838^2 + 9557^2 .

It is an emirp because it is prime and its reverse (394205113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311502493 - 2¹⁷ = 311371421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311592493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155751246 + 155751247.

It is an arithmetic number, because the mean of its divisors is an integer number (155751247).

Almost surely, 2^311502493 is an apocalyptic number.

It is an amenable number.

311502493 is a deficient number, since it is larger than the sum of its proper divisors (1).

311502493 is an equidigital number, since it uses as much as digits as its factorization.

311502493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 311502493 is about 17649.4332203615. The cubic root of 311502493 is about 677.8815943744.

The spelling of 311502493 in words is "three hundred eleven million, five hundred two thousand, four hundred ninety-three".